Mandatory Palestine was a British administrative territory that existed between 1920 and 1948 in the region of Palestine, and after 1922, under the terms of the League of Nations' Mandate for Palestine. The British took the territory deeming it presently unfit for self-governance.
After an Arab uprising against the Ottoman Empire during the First World War in 1916, British Empire forces drove Ottoman forces out of the Levant. For the British, the United Kingdom had agreed in the McMahon–Hussein Correspondence that it would honour Arab independence in case of a revolt but, in the end, the United Kingdom and France divided what had been Ottoman Syria under the Sykes–Picot Agreement—an act of betrayal in the eyes of the Arabs. Another issue that later arose was the Balfour Declaration of 1917, in which Britain promised its support for the establishment of a Jewish "national home" in Palestine. Mandatory Palestine was then established in 1920, and the British obtained a Mandate for Palestine from the League of Nations in 1922. Mandatory Palestine was designated as a Class A Mandate, based on its social, political, and economic development. This classification was reserved for post-war mandates with the highest capacity for self-governance. All Class A mandates other than Mandatory Palestine had gained independence by 1946.